this time about the nsa tapping world alabalealleys. fault lines correspondent explores what it is like to live under constant surveillance. ♪ >> in many ways the nsa surveillance story can seem abstract. sure the sgovment collecting information, but what does that really mean for someone's life? to fine out we went to meet a group of people who definitely know they are being spied on. >> after 9/11 it wasn't just the nsa that increased surveillance. here at the city level in new york, the nypd brought in to senior officials from the cia to help spy on its own citizens. the program is targeting one community, muslims. secret documents show that the nypd is conducting surveillance of entire muslim neighborhoods. >> they visited book stores, cafes, hookah joints, of course mosques. >> reporter: and record conversations using hidden microphones, collect the names and phone gragaits. >> how were they reacting to foreign events abroad, the egyptian revolution or the cartoons about the profit mohammed, what were they saying in the surmonth.